Factor I Deficiency

Factor I (FI) or fibrinogen deficiency is an inherited bleeding disorder caused when a person's body does not produce any or enough of a protein in the blood (fibrinogen) that plays an important role in blood clotting or the fibrinogen doesn't work properly. It is very rare and often found in people whose parents are blood relatives.

Links to selected resources:

What Is Factor I (Fibrinogen) Deficiency?
(World Federation of Hemophilia, 2010)
See the About Bleeding Disorders section.
Explains the causes of Factor I deficiency, its symptoms, diagnosis and treatment.

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